c# - The type or namespace name not found -

i have code write in c# use in unity5 because old version of unity have little problem.

error cs0246: type or namespace name `collider' not found. missing using directive or assembly reference?

code

vector3 worldposition = getcomponent<collider>().bounds.center + vector3.up * collider.bounds.size.y * 0.5f; 

if want perspective of code here.

the error telling you not have type or namespace called collider within solution.

i noticed pastebin solution using typeof(collider). therefore think type collider not collider.

also may need instance of object in order use properties:

collider collider = getcomponent<collider>(); 

then can use collider object access properties size , center.